The production of exhalation from different industrial and energy resources in Slovakia shows a decreasing trend. At present, domestic exhalation resources produce 330,000 t SO2 225,000 t nitrogen x-oxids (NO), and 250,000 t fly ashes per annum. About 160,000 ha of agricultural soil is contaminated, and 30,000 ha is metallized and alcalized. The amount of damage from exhalations per hectare ranges from Skk 880 to 3, 500. In order to assess and quantify objectively the damage, it is necessary to know the equation of imission balance and the progress of the phases of economical damage.